“…Studies that consider sociocultural factors indicate age at onset of use, the length of time an adolescent uses, and frequency of use are all significantly correlated with future substance use (McNamee, Dunfee, Clark, Eddy, & Tarter, 2008;Oxford, Harachi, Catalano, & Abbott, 2000;Degenhardt et al, 2010;Steinberg, Fletcher, & Darling, 1994). These timing considerations are likely rooted in social processes-studies have confirmed the strongest predictor of on-going substance use is the presence of substance-using peers (Nakhaee & Jadidi, 2009;Piehler, Véronneau, & Dishion, 2012;Pollard, Tucker, Green, Kennedy, & Go, 2010;Vervaeke, Van Deursen, & Korf, 2008). Further, the most common source of opioid access for adolescents are friends and family members (Frese & Eiden, 2011;McCabe, West, & Boyd, 2013), and some research indicates that the majority (up to 70%) of youth gain access to opioids in the home (Brands, Paglia-Boak, Sproule, Leslie, & Adlaf, 2010).…”